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View Full Version : divx5 = no additional compression w/o b-frames?(preliminary testing on anime content)


OUTPinged_
5th March 2002, 00:53
hello.

ok, i did some small testing (used utena tv opening (anime) for source)

1. deinterlacing/ivtc dont really work well for anime. period.
2. compression. cut a part of opening and encoded it:

a) nandub with drf2 cap = 5191k
b) divx5 quality based @100%, with b-frames: 4449k
c) divx5 quality based @100%, no b-frames: 5796k????
d) divx5 quality based @100%, no b,gmc,qp: 5644k :/

both codecs look equally bad at drf2, divx5 has a bit more correct picture in some cases.

second torture clip: lain ep13 before opening (unstable noisy picture, 9to17 mbit at 720x resolution, 33sec)

divx3 52mb
divx5+b 44mb
divx5-b 59mb

third clip: lo-mo stuff, slow pannings, etc.

divx3 4712k
divx5+b 3454k
divx5-b 4816k
divx5-all 5265k



so judge yourself. i aint commenting that. atm my point is "wtf am i doing wrong" :/ but it looks like we may have up to 38% increase in compression of lo-mo anime content. that is not that bad. another case is i cant see any improvement with b-frames disabled.

but it looks ok, it plays correctly, wtf do you need more?

i wont say "its better than divx311" until you give me nandub-like app to process stuff anyway :-E and a bag of money too =)

conclusion: I'm evil today!

Tri
5th March 2002, 07:02
I have a similar result with the 4. Love Hina Episode. I encoded at 640*480 and a bitrate of 2000 (I wanted a 2 Episodes/CD Rip).

Without MPEG4-optimizations the final size was about 315 MB, w/ optimizations only 270 MB.

It seems we have to wait for a new bitrate calc...

OUTPinged_
5th March 2002, 07:40
now here is a significant bug:

it looks like divx5 decodes bad in 16bit color mode. it is completely unusable for playback at its current state and i cant disable it rendering 311 streams.

any word on how to aboid this?

tri: wait for a week man and youd have all that.